1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21dfaf3e2d9a80a6d079daf744762da2cb06761596fc9479e0783519d19457. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6aad7e5-e57f-4c9f-ab85-d644f3ba773d.json and https://artists.proofprofile.net/proofs/artist/c6aad7e5-e57f-4c9f-ab85-d644f3ba773d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6883ca4fa905e533a118347ac243136827582867ed389a42e83c9138cf4823b. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9b53ea0cbdff0e6ad60d5085de66637381f08a116fe89a38f8cfc204791a9b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:45:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531dd051842b91d5cf3862c25ee4c7bfedbaff486bcfaa9c0d16f8ad66bc0aa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc20ef70e2e6c68943521fe8a60903a3836f537e968141637d33d584bc4e673. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752a9392ab809e6bf0f7e9e3371a99560f430cae0b96e16e25e4da719fc1963. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691d8176cfe881eeaf8dbae72860bb5db103654a473d30497cb144494d099361. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:32:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f97e9310382f541de81879db6a3f14f4a34090ea95442b5c84fe18c345cded4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:10:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258f9fd27267ee0204256d0de8d4c6bc838ae9b5d5acfbc64383bb43a015dc69. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbe1d3b0d4f9c50fe7b0a66b3ad82d0e7ee720692a6fb6d3c92482d8325e86a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ921208157.